<template>
  <div class="app-container">
    <el-form :model="queryParams" ref="queryForm" size="small" :inline="true" v-show="showSearch">
      <el-form-item label="课时名称" prop="periodName">
        <el-input
          v-model="queryParams.periodName"
          placeholder="请输入课时名称"
          clearable
          @keyup.enter.native="handleQuery"
        />
      </el-form-item>
      <el-form-item label="类型" prop="periodType">
        <el-select v-model="queryParams.periodType" placeholder="课时类型" clearable>
          <el-option
            v-for="dict in dict.type.sys_period_type"
            :key="dict.value"
            :label="dict.label"
            :value="dict.value"
          />
        </el-select>
      </el-form-item>
      <el-form-item label="课程编号" prop="courseNo">
        <el-input
          v-model="queryParams.courseNo"
          placeholder="请输入课程编号"
          clearable
          @keyup.enter.native="handleQuery"
        />
      </el-form-item>
      <el-form-item label="课程名称" prop="courseName">
        <el-input
          v-model="queryParams.courseName"
          placeholder="请输入课程名称"
          clearable
          @keyup.enter.native="handleQuery"
        />
      </el-form-item>
      <el-form-item label="状态" prop="status">
        <el-select v-model="queryParams.status" placeholder="课时状态" clearable>
          <el-option
            v-for="dict in dict.type.sys_normal_disable"
            :key="dict.value"
            :label="dict.label"
            :value="dict.value"
          />
        </el-select>
      </el-form-item>
      <el-form-item>
        <el-button type="primary" icon="el-icon-search" size="mini" @click="handleQuery">搜索</el-button>
        <el-button icon="el-icon-refresh" size="mini" @click="resetQuery">重置</el-button>
      </el-form-item>
    </el-form>

    <el-row :gutter="10" class="mb8">
      <el-col :span="1.5">
        <el-button
          type="primary"
          plain
          icon="el-icon-plus"
          size="mini"
          @click="handleAdd"
          v-hasPermi="['system:period:add']"
        >新增</el-button>
      </el-col>
      <el-col :span="1.5">
        <el-button
          type="info"
          plain
          icon="el-icon-sort"
          size="mini"
          @click="toggleExpandAll"
        >展开/折叠</el-button>
      </el-col>
      <right-toolbar :showSearch.sync="showSearch" @queryTable="getList"></right-toolbar>
    </el-row>

    <el-table
      v-if="refreshTable"
      v-loading="loading"
      :data="periodList"
      row-key="periodId"
      :default-expand-all="isExpandAll"
      :tree-props="{children: 'children', hasChildren: 'hasChildren'}"
    >
      <el-table-column prop="periodName" label="课时名称" width="260"></el-table-column>
      <el-table-column prop="periodType" label="类型" width="100">
        <template slot-scope="scope">
          <dict-tag :options="dict.type.sys_period_type" :value="scope.row.periodType"/>
        </template>
      </el-table-column>
      <el-table-column prop="orderNum" label="排序" width="100"></el-table-column>
      <el-table-column prop="courseNo" label="课程编号" width="200"></el-table-column>
      <el-table-column prop="courseName" label="课程名称" width="200">
        <template slot-scope="scope">
          <span>{{ scope.row.courseName }}</span>
        </template>
      </el-table-column>
      <el-table-column label="课件" align="center" prop="coursewareUrl">
            <template slot-scope="scope">
              <div v-if="scope.row.coursewareUrl == null">
                <img
                  src="@/assets/images/file_gray.png"
                  alt="video"
                  style="width: 30px"
                />
              </div>
              <div v-if="scope.row.coursewareUrl != null">
                <a :href="scope.row.coursewareUrl" target="_blank">
                  <img
                    src="@/assets/images/file_blue.png"
                    alt="video"
                    style="width: 30px"
                  />
                </a>
              </div>
            </template>
      </el-table-column>
      <el-table-column prop="status" label="状态" width="100">
        <template slot-scope="scope">
          <dict-tag :options="dict.type.sys_normal_disable" :value="scope.row.status"/>
        </template>
      </el-table-column>
      <el-table-column label="创建时间" align="center" prop="createTime" width="200">
        <template slot-scope="scope">
          <span>{{ parseTime(scope.row.createTime) }}</span>
        </template>
      </el-table-column>
      <el-table-column label="操作" align="center" class-name="small-padding fixed-width">
        <template slot-scope="scope">
          <el-button
            size="mini"
            type="text"
            icon="el-icon-edit"
            @click="handleUpdate(scope.row)"
            v-hasPermi="['system:period:edit']"
          >修改</el-button>
          <el-button
            size="mini"
            type="text"
            icon="el-icon-plus"
            @click="handleAdd(scope.row)"
            v-hasPermi="['system:period:add']"
          >新增</el-button>
          <el-button
            v-if="scope.row.parentId != 0"
            size="mini"
            type="text"
            icon="el-icon-delete"
            @click="handleDelete(scope.row)"
            v-hasPermi="['system:period:remove']"
          >删除</el-button>
        </template>
      </el-table-column>
    </el-table>

    <!-- 添加或修改课时对话框 -->
    <el-dialog :title="title" :visible.sync="open" width="600px" append-to-body>
      <el-form ref="form" :model="form" :rules="rules" label-width="80px">
        <el-row>
          <el-col :span="24" v-if="form.parentId !== 0">
            <el-form-item label="上级课时" prop="parentId">
              <treeselect v-model="form.parentId" :options="periodOptions" :normalizer="normalizer" placeholder="选择上级课时" />
            </el-form-item>
          </el-col>
        </el-row>
        <el-row>
          <el-col :span="24">
            <el-form-item label="课程名称" prop="courseNo">
                <el-select v-model="form.courseNo"  filterable placeholder="请选择课程">
                  <el-option
                  v-for="item in courseOption"
                  :key="item.courseNo"
                  :value="item.courseNo"
                  :label="item.courseName"
                  :disabled="item.status == 1"
                />
                </el-select>
              </el-form-item>
          </el-col>
        </el-row>
        <el-row>
          <el-col :span="24">
            <el-form-item label="课时类型" prop="periodType">
                <el-radio-group v-model="form.periodType">
                  <el-radio
                    v-for="dict in dict.type.sys_period_type"
                    :key="dict.value"
                    :label="dict.value"
                  >{{dict.label}}</el-radio>
                </el-radio-group>
              </el-form-item>
          </el-col>
        </el-row>
        <el-row>
          <el-col :span="12">
            <el-form-item label="课时名称" prop="periodName">
              <el-input v-model="form.periodName" placeholder="请输入课时名称" />
            </el-form-item>
          </el-col>
          <el-col :span="12">
            <el-form-item label="显示排序" prop="orderNum">
              <el-input-number v-model="form.orderNum" controls-position="right" :min="0" />
            </el-form-item>
          </el-col>
        </el-row>
        <el-row>
          <el-col :span="12">
            <el-form-item label="时长(分钟)" prop="playTime">
              <el-input v-model="form.playTime" placeholder="请输入播放时长，单位为分钟" maxlength="11" />
            </el-form-item>
          </el-col>
          <el-col :span="12">
            <el-form-item label="课时状态">
              <el-radio-group v-model="form.status">
                <el-radio
                  v-for="dict in dict.type.sys_normal_disable"
                  :key="dict.value"
                  :label="dict.value"
                >{{dict.label}}</el-radio>
              </el-radio-group>
            </el-form-item>
          </el-col>
        </el-row>
        <el-row>
          <el-col :span="24">
            <el-form-item label="上传课件" prop="coursewareUrl">
              <file-upload v-model="form.coursewareUrl"/>
            </el-form-item>
          </el-col>
        </el-row>
      </el-form>
      <div slot="footer" class="dialog-footer">
        <el-button type="primary" @click="submitForm">确 定</el-button>
        <el-button @click="cancel">取 消</el-button>
      </div>
    </el-dialog>
  </div>
</template>

<script>
import { listPeriod, getPeriod, delPeriod, addPeriod, updatePeriod, listPeriodExcludeChild } from "@/api/course/period";
import { wholeList } from "@/api/course/course";
import Treeselect from "@riophae/vue-treeselect";
import "@riophae/vue-treeselect/dist/vue-treeselect.css";

export default {
  name: "Period",
  dicts: ['sys_normal_disable','sys_period_type'],
  components: { Treeselect },
  data() {
    return {
      // 遮罩层
      loading: true,
      // 显示搜索条件
      showSearch: true,
      // 表格树数据
      periodList: [],
      // 课时树选项
      periodOptions: [],
      // 课程数据
      courseOption: [],
      // 弹出层标题
      title: "",
      // 是否显示弹出层
      open: false,
      // 是否展开，默认全部展开
      isExpandAll: true,
      // 重新渲染表格状态
      refreshTable: true,
      // 查询参数
      queryParams: {
        courseNo: null,
        courseName: null,
        skip: null,
        periodName: null,
        status: null
      },
      // 表单参数
      form: {},
      // 表单校验
      rules: {
        parentId: [
          { required: true, message: "上级课时不能为空", trigger: "blur" }
        ],
        periodName: [
          { required: true, message: "课时名称不能为空", trigger: "blur" }
        ],
        orderNum: [
          { required: true, message: "显示排序不能为空", trigger: "blur" }
        ],
        playTime: [
          {
            pattern: /^[0-9]+$/,
            message: "请输入非负整数播放时长",
            trigger: "blur"
          }
        ],
        courseNo: [
          { required: true, message: "请选择课程", trigger: "change" }
        ],
      }
    };
  },
  created() {
    this.getList();
    this.getCourseList();
  },
  methods: {
    /** 查询课时列表 */
    getList() {
      this.loading = true;
      if(this.$route.params.courseNo !=null){
        this.queryParams.courseNo = this.$route.params.courseNo;
        this.$route.params.courseNo = null;
      }
      listPeriod(this.queryParams).then(response => {
        this.periodList = this.handleTree(response.data, "periodId");
        this.loading = false;
      });
    },

    /** 查询课程列表 */
    getCourseList() {
      wholeList(this.queryParams).then(response => {
        this.courseOption = response.data;
      });
    },
    /** 转换课时数据结构 */
    normalizer(node) {
      if (node.children && !node.children.length) {
        delete node.children;
      }
      return {
        id: node.periodId,
        label: node.periodName,
        children: node.children
      };
    },
    // 取消按钮
    cancel() {
      this.open = false;
      this.reset();
    },
    // 表单重置
    reset() {
      this.form = {
        periodId: null,
        courseNo: null,
        parentId: null,
        periodType: "1",
        periodName: null,
        orderNum: null,
        playTime: null,
        coursewareUrl: null,
        status: "0"
      };
      this.resetForm("form");
    },
    /** 搜索按钮操作 */
    handleQuery() {
      this.getList();
    },
    /** 重置按钮操作 */
    resetQuery() {
      this.resetForm("queryForm");
      this.handleQuery();
    },
    /** 新增按钮操作 */
    handleAdd(row) {
      this.reset();
      if (row != undefined) {
        this.form.parentId = row.periodId;
      }
      this.open = true;
      this.title = "添加课时";
      listPeriod().then(response => {
        this.periodOptions = this.handleTree(response.data, "periodId");
      });
    },
    /** 展开/折叠操作 */
    toggleExpandAll() {
      this.refreshTable = false;
      this.isExpandAll = !this.isExpandAll;
      this.$nextTick(() => {
        this.refreshTable = true;
      });
    },
    /** 修改按钮操作 */
    handleUpdate(row) {
      this.reset();
      getPeriod(row.periodId).then(response => {
        this.form = response.data;
        this.open = true;
        this.title = "修改课时";
      });
      listPeriodExcludeChild(row.periodId).then(response => {
        this.periodOptions = this.handleTree(response.data, "periodId");
      });
    },
    /** 提交按钮 */
    submitForm: function() {
      this.$refs["form"].validate(valid => {
        if (valid) {
          if (this.form.periodId != undefined) {
            updatePeriod(this.form).then(response => {
              this.$modal.msgSuccess("修改成功");
              this.open = false;
              this.getList();
            });
          } else {
            addPeriod(this.form).then(response => {
              this.$modal.msgSuccess("新增成功");
              this.open = false;
              this.getList();
            });
          }
        }
      });
    },
    /** 删除按钮操作 */
    handleDelete(row) {
      this.$modal.confirm('是否确认删除名称为"' + row.periodName + '"的数据项？').then(function() {
        return delPeriod(row.periodId);
      }).then(() => {
        this.getList();
        this.$modal.msgSuccess("删除成功");
      }).catch(() => {});
    }
  }
};
</script>
